Proxmox VE on SATA III, VMs on NVMe, Proxmox Backup on 2.5". Restoring VE?

[Kodapan]

I'm considering Proxmox and have some questions.

I've been running hypervisors for a long time, but as of the last years I switched to running Kubernets on a bunch of RPIs. It's no longer enough. I need greater hardware. I'm considering NUC13ANHi5, an Intel NUC 13 Pro tall i5, stuff it with 64GB RAM. It fits one 2242 SATA III, one 2280 PCIe x4 g4 and one 2.5".

My plan is to:
* Boot and run Proxmox VE on a 128GB 2242 SATA III, 520 MBps read/300MBps write.
* VMs on a 2TB Samsung 990 PRO 2280 PCIe x4 gen4.
* Proxmox Backup server in a VM, running backups to a 4TB Samsung 940 EVO 2.5".

When the 2242 SATA III with Proxmox VE fails, can I just replace the disk, boot up from an USB and somehow restore Proxmox VE from the Proxmox Backup server?

Or do I need some other solution to handle the backup of the Proxmox VE with all VMs and configurations?


Thanks!
Kodapan

 

[LnxBil]

Proxmox Backup server in a VM, running backups to a 4TB Samsung 940 EVO 2.5".

What is the point of that? Please keep 3-2-1 rule in mind.

When the 2242 SATA III with Proxmox VE fails, can I just replace the disk, boot up from an USB and somehow restore Proxmox VE from the Proxmox Backup server?

No, you cannot start your backup server due to a chicken-egg-problem: in order to restore the pbs VM, you need your pbs. Backups have to be keep off-machine or they're not backups.

Or do I need some other solution to handle the backup of the Proxmox VE with all VMs and configurations?

You can do all backups without PBS just on a local disk. Maybe that makes more sense in this one-node setup.

For starters: the first thing that'll normally break are the disks, so create a RAID. With that, most of all technical problems are taken care of. Backups go offsite or at least offdisk if you only can have one machine.